Rock-drill.



PATENTED MAR. 13, 1906.

J. G. LEYNBR.

ROCK DRILL. uruuuxqn mum ma. 1.12%.

2 SHBETB-SHEET 1.

PATENTED MAR. 13, 1906.

3. G. LEYNER. RGGK DRILL.

unmumn mum ma. 1. ma.

2 SHEETS-SHEET 2.

la i-IK JOHN GEORGE LEYNER, 6F. DENVER COLORADO.

Hoaxonic; 7

specificsticn of Laces 2mm.

Patented Harsh 13. 1906.

Origiull lpplloltion Bled June 24, 1904,8srlal No. 213386. Divided andthis application filerlnugmt 1. 65. Serial No. 272,1?5.

. a citizen of the United States of America, rc-

siding in the cit and county of Denvcr and State of Colors. 0, haveinvented a new and restful Rock-Drill, of which the following is asp'ecification.

My invention relates to improvements in rock-cutting drill-liit-rotatingmechanisms for hammer-piston rock-drilling engines; and the objects of minvention are, firstgo provide a rock-dril ing engine havin' amanually-operated drill-hit feediu mi' rotating mechanism; second, toprovide a foal-screw drill-bit-rotating mechanism for laminar-pistonrock-drills third, to rovide a small smipie light-weight rock-r rillingengine that can be reciprocally fed in a su Eorting-shcll that isadapted to be supporte y's stoping bar or tripod and in which therock-cutting drill-bit is rotated and fed b the rotation of thefeBd-SGIBW. I attain t ese objects by the mechanism illustrated in theaccompanyin drawings, in which- V igure 1 is a siclcclcvation of myimproved feed-screw drill=bit-rotaling rock-drilli enins. Fig. Ms 9.plan view'thcreof. l ig. 3 1s a central vertical lonlgitudinal sectionalview on the line 3 3 of ig.. 2. disc ing removed and a. portion of thecylindcr head being broken away to show the ears;

line 7 7 of Fig.

which eficcf. the rotation of the dr ll-bit; "Fig? from. and elevationof Fig. l thc d highs our; :3.

5 is a vertical transverse sectional view taken on the line 5 5 of Fig.3. view taken on the line 6 6 of and Fig. 7 is a, vertical transversesection view on 3 showing the drill-operstin cars at this end of the 0inc, a portion 0? t e cap of the casing in w ich they are lo- Fi 6 is asiiiiilsr" cated being broken away for this purpose;

Similar numersls of reference refer to similsriggrls throoghout theseveral views.

cfirrisg to'tho drawings, the numeral 1 dos teslhs cylinder of myrock'driliing engmc. This cylinder is providad with an anal bore of twodiameters 2 and 3, the larger of which, 2, extends into it from its rearand for the greater portion 01 the length of the piston-hsmmcrs stroke,where it terminutes in a. squarc shoulder 4 at the beginning of thesmaller bore 3, which continues from the shoulder to the front endportion of the cylinder. The entrance to the rear end of thecylinder-bore is threaded, and the cylinder is provided with acylinder-hood 5,

which compcises a ilaugc portion 6, with a pro ecting u xngoimiutportion 7 on its outsidv and a hill) portion on IlB-i msnlo, which isthroudod tqsrrew into the threaded lm're of tho vyllurlcr until thoflange boots tightly against lilo cud of the cylinder. At a shor dismnvvfrom the roar 0nd of the. cylinder 1 form on the cylinder a transversecylindrical boss portion 8, m which are formed circular air-inlet a)crturcs 9, the entrances of which are! llama ed to receive the threadedconfisgti end of a hose, winch ES used to con- F nect t e cylinder to asupply of cmupresscd air. The air-hose may be conuectcd 0 by twoport-holes 14 and 15, that are bored throu h the shell of the. bosses 8at conve ing 9 iquc angles through proicctix ri Sf; that 'cxtcud alongthe sides of lhecy indcr' and connect the bosses witli acircimifsi'cntial rip 8*" which surrounds thc'cglindor over the v Theentrances to t oft-holes H and 18am plugged up tight. a tor the aredrilled. At, substantially the some dis nco froni' ho port 13 that, theinletrt 12 is "from the port 13 a circumfcrcnris exhaust,- iort 16 is{ormcd in the cylindvr. This exhaust-port is o 7 n to the atmosplmrothrough llfoxtcud through the bottom a hold" I T, was

cumfcrcutial rib 16- is formed on tho periphory. of the cylinder overthc port. '16. I n the horn of the cylinder I reciprocally mount. apiston-hammer 18, the peripheral surfuvv of which is nmd c in twodiameters l9 and 2;) in lit ilm two dininctcrs of the cliuder's bore.Tho piston-hammer is providc with an axial Imre of hrodimncters 21 and22, which ox dist-ancc from its'ironl; end The larger bore. 21 of thisaxicl upcrtoro is at tho roar-42nd Fortioo of'the' piston-hammer, and itextends either side of he lmss, and a. plug 11 is- Thcsc sir-in romLhc-rcanpnd of the piston-hanmwr to,

loud into it from its roar and to within a short.

tb' ugh the lower edge of the periphery of .ch a plurality of port-holes24 are formed that extend radially through the shell of thepiston-hammer. hose port-holes form the air-inlet ports to the interiorof the pistonhammer. A plurality of exhaust-port holes 25 also radiatefrom the inner end of the smaller diameter of the axial aperture 22through the shell of the piston-hammer. In

to the front end of the cylinders bore I place a long drill-bit-holdingsleeve 26, which is provided with a slightly-enlarged collar portion 27,which fits into a steppe counterbore 28. formed in the edgeof thecylinders bore, and

15 a large counterbore 29, that extends intothe end of the cylinder. Isecure the sleeve in the end of the cylinder by clamping the end of the'cylinder to it. This clamp 1 form by cutting a groove through the end ofthe 2b cylinder, and on opposite sides of the groove I form lugs 31 and32, through which I insert- .a bolt 33, which when tightened clamps thend of the cylinder to the sleeve, securing it rigidly in the end of thecylinder. The front 25 end of the cylinder is providedwith acylinder-head 34, which is bolted to lateral lugs35, formed on its sidesby cap-screws 36. A step 36 is formed on the cylinder-head that projectsinto the'counterbore. The drill-hold- 0 mg sleeve is provided with anaxial aperture 37, which is adapted to receive loose] the shank end 39of arock-cutting drill-bit 40, which extends through the sleeve into there ciprocal path of thepiston-hammer, which 3 5 strikes directly on its'end, as will be described more fully hereinafter. -I preferably makethe terminal end of the drill-bit that extends through'thedrih-bit-holding sleeve and the hole in this sleeve round, although itmay be 40 givena olygonal form,if desired. The large counter orcaperture '29, formed in the forward end of the cylinder, intersects asmaller counterbore 41, which is formed slightly below and at one sideof the counterbore 29 in a l 5 lug 41 and intersects it so that the twocountated by the gear whenever it is rotated as 4 the hexagon aperturelocks the gear to the l drill-bit. The gear 43 fits rotatabl in the (IQcounterboro 41 of the cylinder.

hit N) may be made with any desired num her or arrangement ofrock-cutting lips. The

shank may be of an desired form of crosssection from the roc -cuttinglips up't-o its 65 rotating gear 42, where some. form of po- T isdanlygonal surface is lormed in itfand'the axial aperture in the gear ismade to correspond with it, in order to loosely key the gear anddrill-bit together. so that the drill-bit will be rotated by the gear.

The cylinder 1 is supported in a shell H by means of guideways 45, whichare depended below the cylinder and extend outward from it on oppositesides of it. These guideways lit in slidewav-recesscs 46, formed in theopposite sides of the supporting-shell. On the bottom of the shell 11depending circular inverted dovetailed hub 47 is formed that is adaptedto be adjustably clamped to a sto ing-bar or to a tripod, either olwhich I t o not illustrate. This circular hub enables the shell andcylinder to he pivotally adjusted in an \'desired position in anysuitable stopingbar or tripod. The rear end of the shell at its sides isprovided with projecting lugs 48, to which one end of a pair of rods 49are bolted. These rods are provided with collars 50 close to theiropposite end, and their ends are threaded and project through the. lugs51,-and nuts 52 are screwed on them against the lugs and clamp themrigidly to the lu s. Theopposite ends of these rods extend through lugs53, formed on opposite sides of a bearing-block 54, which is rigidlyclamped to them by nuts 55, threaded to their ends. This bearin -blockis provided with a central aperture 0? two diameters, the smaller aerture of which receives the terminal cm of the feed-screw 56, whichprojects through it far enough to receive acrankhandle 66, which iskeyed or otherwise se cured to it in any suitable manner. In the largerdiameter of this central aperture in the bearing-block 54 a gear 57 isrotatably seated. This ear is secured to the feed-screw and may be madeintegral with it, if desired. The bearing-block is provided with acircular chamber 58, which is formed at one side of ear 59 is rotatablyseated in this chamber to mesh with the gear 57. A cap 60 is bolted tothe inner side of the block by capscrews 61. A rod 62 extends throughthe center of the gear 59 and also throu h an aperture in the cap andthrough the look into a hub portion 63, formed on the rear side of thelock to form a bearing for its rear terminal end. The gear 59 may besecured in an suitable way to the rod 62, or may, if desired: be made anintegral part of it. The rod 62 extends from the bearing-block 54 toa-short l distance beyond the front end of the cylinder and passesthrough the projecting lug 41and 5 gear 43. l

- The gear 43 is provided with an axial aperture that its loosely overthe rod 62, and a feather-kev is secured to it that [its loosely andslidably in a keyway or spline 65,for|ned in the rod. Thisarrangementpermits me to j arrange the gears in the lienring block 54and the central aperture and intersects it, and a so vital andessenial'feature of en et the drill-bit to give any desired number ofrotations or a proportion of a revolution to the drill-bit relative toa, revolution of the feed-screw. The feed-screw 56 is threeded '5 tonnut 66, which is secured to e depending in 67, forrned on the rear endof the cylinder.

he operation of my improved rock drillrotating device is as follows: Myimproved rock-drilling engine and its supportin shell are mounted on anysuitable stopinger in a tunnel, stops, drif or shaft of a mine ineperative relation to rock, and essumin the pretontohe at the end ofitsforward stro e in the cylinder, as shown in Fig. 2, the compressed anflows from its source of supply into the inlet'port l2 and throughthelateral ports 14 and 15 to the port 13,end entering the c linderbetween the shoulder 4 of the cylin er and the shoulder of thepiston-hammer 2o moves the piston backward to the rear-end of its strokein the cylinder, and when the ports of the piston-hammer pass theinlet-port 12' the air rushes from the inlet; ort into and through thelurality of radio ports 24 into 2 5 the interior 0 the piston-hammer endtotlie reer-end,cushioning it just before it strikes l the "cylinder.The air then, ain enters the inlet-port 9 and the reciproca stroke is repeeted; The iston-hammerstrikes theendof 3o the rock euttm drill-biteachtime it is struck by the pistonemmer, and the o crater retotes thecrank-handle and thef -serewand feeds the cylinder forward in'itssudgRIorBtijng shell just fast enough to trees the V r o eretiverelation torock,an the rotation of t e feed-screw rotates the earfiflwhiehrotatesthe gear 59, and the rut 62,wirich rotates the gee-r43,and the gear 43 rotates the gear 42, which rotates the drill-bit.Consequently the 40 drill-hit is rotated by the feed-screw at the sametime it is being fed forward into rock durin the. operation of thehammer-piston. The rill-hit is simply inserted or pushed into its gearand sleeve and rests loosely in them in striking relation to the path ofthe iston hammer, and thee der must be fed the operator to from t edrill-bit eonstan grfigsinst the rock; and my piston hem -bit rotatingdevice iossesses the g a ling the operator not onl to do this in themost desrr: able manner, at the gear-rotating mechanism is so sensitivethat it transmits from the rock-cuttin H 9 through the drill-bit andgears and t e OEIl-SOI'BW to the hand of the olgerator full knowledge ofthe character of t c rock the drill-bit is cattle in, as every trembleand vibration of the c rill-bit is dis- Q tinctly felt by the hand ofthe operator and 6: as the vihrationsof the drill-bit ere verydistinetly difierent when drilling in rock of different degrees ofhardness and of seanly'enrl talcky and soft rock the operator is'inpositive direct physical touch with the cuttin points of the drill-bit,every blow of whic bit against the bot tom of the hole is telegraphed tohis hand, and he can govern the rotation of the drill-bit end its feedinto the rock according to the conditions of the rock he is drilling in.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, isl 7 1. In a rock-drilling ermine, a cylinder, esupporting-shell in whirl said cylinder is mounted, a listen-hammerreciprocally mounted in serd'cylinder, e drill-bit loosely sup orted insaid c 'lindcr, in the reciprocal at of sold piston-hammer, a polygonalsurace on said drill-hit, a gear loosely mounted onseid drill-hit androtatably journaled in said cylinder, a car in mesh with said driller, arod sl idebly keyed to said geery a fee -screw operetively connected tosaid cylinder and shell, and means including caring connected to saidfeed-screw and sun rod for simultaneously rotating said rod andfeedserew'. e

2, in sQ'rock-drillin engine, a cylinder, a

supporting-shell in w ich said cylinder is slidebly rnounted, apiston-hammer, reeipro- 9o erilly mounted in said cylinder, e drill-hitsupgorted in said cylinder in the reciprocal pet of said piston-hammer,a gear retntehl nrofinted in said cylinder end providedwit 1epoiggonal-shaped axial e rture, surrounding t e entrance to said dri1-bit, a polygonalshsyed surface on said drill-bit adapted to loosely inthe aperture in said ear, e ear rotatsbly journelod insaid cylintier endarranged in operative mesh with said drill-bits gear, a rod slidingiykeyed to said second gear, a, feed-screw o eratively connected to saidcylinder and 3 roll, and means including gearing, connected with saidfeedscrew and said rod whereby rotation of said feed-screw efl'ectsrotation of said drill-bit.

H3. In a rock-drilling engine, an oporotive cylinder and hammer-pistonand a. supportin raisin a. feedecrevfoperutively connectof to sui lcylinder and casing to feed said no cylinder thercin s drill-hit in saidcylinder, at

mil mouiited'insaid cylinder, at kcywey in said rod, 9. gear surroundinsaid drill-hit, n 'see'ondfgcnr in mesh with said dl'lll-llits gear, afeather-key secured to said second gear and proiecting loosely into saidkoywoy of said rod, and means including o. gom'ilw arranged between saidfood-screw and roll; whereby rotation of said iced-screw ell'ertsrotation of said rod end drill-hit.

4, In a rock-drilling engine, a cylinder, at rock-cuttin drill-bit,esnpporting-sln-ll, n. motive-lion controlled hummer-piston for strikingsaid drill-bit, and a feed-screw arranged to feed said cylinder insaidshell, in 12 gear on Enid food-screw, a second gear in mesh with thegear on seirl feed-screw, a. rod secured at one end to said second gear,and sniteljle' connections between the opposite cr'rrlof said rod anddrill-bit whereby rotation r 30 tahly support a of said feed-screw androd cllects rotation of said drill-bit.

5. Ina rock-drill. the combination of a cylinder arranged to support adrill-hit,a pistonhammer reciprocally mounted in said cylinder to strikesaid drill-hit, a supporting-shell in which said cylinder is slidahlymounted, a feedscre\i' rotatahly mounted in said shell and threadcdlvconnected to said cylinder, a gear mounted on said drill-hit. a gear onsaid iced-screw, a second gear rotatahly supported by said shell. and inmesh with said feedscrews gear, a rod secured at one end to said secondgear, and extending to the forward eml of said shell, and a gearslidahly feathered to said rod and in operative mesh with saiddrill-bits gear. \\'hereh rotation of said feed-screwell'eets rotationof said drill-bit.

6. In a rock-drill. the combination of a cylinder. a drill-hit supportedby said cylinder, at pistotrhammer reciprocally mounted in said cylinderto strike said drill-hit. and a supporting-shell in which said cylinderis slidably mounted and provided with a rearwardly-extemlin" portionadapted 'to rotah-ed-serew and its operative crank. agea'r on saiddrill-hit, a second drillhit gear rotatably mounted in said cylinder inmesh with said drill-bit's gear, and ar ranged to impart rotativemovementto said drill-hit when it is rotated, an axial aperture in saidsecond gear, a leather-key in said a erture, a feed-screw rotatahlymounted in said shell and threaded to said cylihrler. a gear rotatahlyseated in the rearwardly-extending portion of said shell and mounted onsaid feed screw, asecond gear rotatahly seated in saidrearwardly-extending portion of saidvshell and arranged in rotative meshwith the gear on said feed-screw, a rod secured at one end to saidsecond-named gear. and extending to the forward end of said shellloosely through said drill-bit gear, and a kcyway in said rod into whichsaid feather-key ol said second drill-hit gear extends loose v, as setforth.

7. In a rock-drilling engine, the combination of a cylinder, atpiston-hammer, a drillbit having'a gear housed in said cylinder and'mounted loosely on said drill-hit, with a supporting-shell in which thesaid evlinder is slidahly mounted, a feed-screw threaded to saidcylinder and rotatablv mounted in said shell, a "car housed in saidshell and secured to said ecd-screw, a rod rotatable ll l0lll'ltt .i atone end in said shell and rotatably mount edIat its opposite end in saidcylinder. a gear housed in said shell aml secured at-one end of saidrod, arranged in mesh with the gear on anrdghr eaded td said cylinder,and means co neeted with said feed-screw for rotating said rod,substantially as described.

9. In a rock-drilling engine, the combination with a cylinder, apiston-hannner, and a drill-hit, of a su )porting-shell in which thesaid cylinder is s idably mounted, a bearing block seeural to saidshell, a feed-screw provided with a gear rotatably mounted in saidhearing-block, a nut threaded to said feedscrew and seeurd to saidcylinder, a rod rotatably mounted in said bearing-block at one endandfrotatably and slidably mounted in said cylinder 'a gear secured tosaid rod, in

mesh with the ear on said feed-screw, and

means cohneete' with said rod and said drillbit i whereby rotation of isaid feed-screw,effee-ts rotation of said drill-bit.

it). In a rock-drill, a cylinder having a pie 5 ton-hammer and arevoluljle drillehuc k; a support upon which said cylinder is slidablly;

mounted, a feed-screw in en agement wit.

said cylinder and support, 0 uck-rotating means eccent-rically mountedwith respect to said feed-"screw and geared thereto, and means wherebyrotationpf said feed-screw IOO elTeets rotation of said chuck,substantially as described. a i

It. In a rock-drill, a cylinder having a pieton-hammer and a revolubledrill-chuck, a support upon which said cylinder is slidablv mounted, afeed-screw in engagement with said cylinder and so port, a. rodextendingloiwitudinally of said cylinder and geared to Suit feed-screw,and means whereby rotation of said feed-screw etl'ccts rotation of saidchuck, substantiallv as described.

12. In a rockslrill, a cylinder having a pis t'ou-haanaer and arevolubledrill-chuck asupport upon which said .cylinder is slidah]mounted, a feed-scrmwin engagement wit said cylinder and support, a rod[on itudinally slidahle with respect to said fee sscrew and gearedthereto, and means whereby rotation of said feed-screw efl'ects rotationof said chuck, substantially as described.

13. In a rock-drill, a cylinder having a is.-

i ton-hammer,a support upon which the cy in:

said feed-screw, and a gear housed in said cyl- 5 inder, in mesh withsaid drill-hit gear, and

feathered slidahly on said I'od, substantially as described. H. la aroek-drdhug engine. the combination of a cylinder. at piston-haminer, adrillder is mounted, a drill-lat, feeding means in engagement with saidcylinder amlsupport, longitudinally -slidahle means eccentricallymounted with respect to said feeding means for rotating said drill-hit,and gearing wherehy rotation ol'said feeding mean oilect rotation ofsaid drill bit, substantially as de scribed.

14. In a rock-drill, a cylinder having a. ist-on-hammer, a sup orb u onwhich the 0y inn der is. mounted, a. rill-bit, feeding means in byfofiatien of said feeding means effects rota- 1o tion of said drill-bit,substantially as de scribed. V v

In testimony whereof I aflix my signature in presence of,tw0 witnesses.A

v JOHN GEORGE LEYNER. Witnesses:

R. LOUISE BROWN, GUSTAV RAWBEN.

